Air Quality Sensor MQ-135 w/ Breakout Board Digital & Analog Output

RM15.00

MQ135 is a semiconductor sensor which can detect the presence of Ammonia (NH3), Mono-nitrogen oxides (NOx), Alcohol, Benzene, Smoke, Carbon-dioxide (CO2) etc. This module is commonly used as an Air Quality Sensor as it has good sensitivity to harmful gases in wide range. The sensitive material used for this sensor is SnO2, whose conductivity is lower in clean air. It’s conductivity increases as the concentration of sensing gases increases. MQ135 Air Quality Sensor can be easily interfaced with Microcontrollers, Arduino Boards, Raspberry Pi etc using an Analog to Digital Converter (ADC).

Features:

Low Cost

Stable and Long Life

High sensitivity to Ammonia, Sulfide and Benzene

Good sensitivity to harmful gases in wide range

Output voltage boosts along with the concentration of the measured gases increases

After doing some research about this sensor it was discovered that while the MQ-135 can detect all of the gasses listed above, it cannot distinguish between them. If you are looking to specifically target one gas, it might be better to find a different sensor.

This sensor also needs uses a heater to warm up the sensor. It has been advised to not use this with a small battery source as it will quickly drain your battery.